Create an Info Graphic for a training poster

• Status: Closed
• Prize: $69
• Entries Received: 9
• Winner: Badraddauza

Winner

Contest Brief

Create an info graphic / poster for a flying school. To show three landing techniques. (De-Crab During Flare, Touchdown In Crab &Sideslip (Wing Low)

Design Criteria
- Colours and design up to you.
- upto half the content can be left out.
- a graphic of a Boeing 777 aircraft is the aircraft to be included (no airline branding)
- graphic of a runway / runways can be included.

Content

De-Crab During Flare

The objective of this technique is to maintain wings level throughout the
approach, flare, and touchdown.

On final approach, a crab angle is established with wings level to maintain the desired track. Just prior to touchdown while flaring the airplane, downwind rudder is applied to eliminate the crab and align the airplane with the runway centerline.

As rudder is applied, the upwind wing sweeps forward developing roll. Hold
wings level with simultaneous application of aileron control into the wind. The
touchdown is made with cross controls and both gear touching down
simultaneously. Throughout the touchdown phase upwind aileron application is
utilized to keep the wings level.

Touchdown In Crab

The airplane can land using crab only (zero sideslip) up to the landing crosswind
guideline speeds.

On dry runways, upon touchdown the airplane tracks toward the upwind edge of
the runway while de-crabbing to align with the runway. Immediate upwind aileron
is needed to ensure the wings remain level while rudder is needed to track the
runway centerline. The greater the amount of crab at touchdown, the larger the
lateral deviation from the point of touchdown. For this reason, touchdown in a
crab only condition is not recommended when landing on a dry runway in strong
crosswinds.

On very slippery runways, landing the airplane using crab only reduces drift
toward the downwind side at touchdown, permits rapid operation of spoilers and
autobrakes because all main gears touchdown simultaneously, and may reduce
pilot workload since the airplane does not have to be de-crabbed before
touchdown. However, proper rudder and upwind aileron must be applied after
touchdown to ensure directional control is maintained.

Sideslip (Wing Low)

The sideslip crosswind technique aligns the airplane with the extended runway
centerline so that main gear touchdown occurs on the runway centerline.
The initial phase of the approach to landing is flown using the crab method to
correct for drift. Prior to the flare the airplane centerline is aligned on or parallel
to the runway centerline. Downwind rudder is used to align the longitudinal axis
to the desired track as aileron is used to lower the wing into the wind to prevent
drift. A steady sideslip is established with opposite rudder and low wing into the
wind to hold the desired course.

Touchdown is accomplished with the upwind wheels touching just before the
downwind wheels. Overcontrolling the roll axis must be avoided because
overbanking could cause the engine nacelle or outboard wing flap to contact the
runway. (See Ground Clearance Angles - Normal Landing charts, this chapter.)
Properly coordinated, this maneuver results in nearly fixed rudder and aileron
control positions during the final phase of the approach, touchdown, and
beginning of the landing roll. However, since turbulence is often associated with
crosswinds, it is often difficult to maintain the cross control coordination through
the final phase of the approach to touchdown.

If the crew elects to fly the sideslip to touchdown, it may be necessary to add a
crab during strong crosswinds. (See the landing crosswind guidelines table, this
chapter). Main gear touchdown is made with the upwind wing low and crab angle
applied. As the upwind gear touches first, a slight increase in downwind rudder is
applied to align the airplane with the runway centerline. At touchdown, increased
application of upwind aileron should be applied to maintain wings level.

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